Revert "added checkerboard"

This reverts commit d940040a8cec654d02a3d0241f7f835eaf9ce135.
Revert "Revert "added checkerboard""

This reverts commit 8f00d70a0f1b9c726155d6e5091705eda36f4be8.
Merge branch 'master' of https://github.com/michaeaj/ChessDetection
Better version of corner finding
Better Version of conrner detection